Spring Cloud之部门微服务项目

项目完整源码https://gitee.com/chuzhuyong/spring-cloud2020/tree/master

本次项目使用的Spring Boot和Spring Cloud的版本

 Rest微服务构建案例工程模块

一、使用maven构建整体父工程spring-cloud2020

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
 
  <groupId>com.uos.springcloud</groupId>
  <artifactId>microservicecloud</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>pom</packaging>
 
 
  <properties>
   <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
   <maven.compiler.source>1.8</maven.compiler.source>
   <maven.compiler.target>1.8</maven.compiler.target>
   <junit.version>4.12</junit.version>
   <log4j.version>1.2.17</log4j.version>
   <lombok.version>1.16.18</lombok.version>
  </properties>
 
  <dependencyManagement>
   <dependencies>
     <dependency>
       <groupId>org.springframework.cloud</groupId>
       <artifactId>spring-cloud-dependencies</artifactId>
       <version>Dalston.SR1</version>
       <type>pom</type>
       <scope>import</scope>
     </dependency>
     <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-dependencies</artifactId>
       <version>1.5.3.RELEASE</version>
       <type>pom</type>
       <scope>import</scope>
     </dependency>
     <dependency>
       <groupId>mysql</groupId>
       <artifactId>mysql-connector-java</artifactId>
       <version>5.0.4</version>
     </dependency>
     <dependency>
       <groupId>com.alibaba</groupId>
       <artifactId>druid</artifactId>
       <version>1.0.31</version>
     </dependency>
     <dependency>
       <groupId>org.mybatis.spring.boot</groupId>
       <artifactId>mybatis-spring-boot-starter</artifactId>
       <version>1.3.0</version>
     </dependency>
     <dependency>
       <groupId>ch.qos.logback</groupId>
       <artifactId>logback-core</artifactId>
       <version>1.2.3</version>
     </dependency>
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
       <version>${junit.version}</version>
       <scope>test</scope>
     </dependency>
     <dependency>
       <groupId>log4j</groupId>
       <artifactId>log4j</artifactId>
       <version>${log4j.version}</version>
     </dependency>
   </dependencies>
  </dependencyManagement>
</project>

二、microservicecloud-api公共子模块Module

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <parent><!-- 子类里面显示声明才能有明确的继承表现，无意外就是父类的默认版本否则自己定义 -->
        <groupId>com.uos.springcloud</groupId>
        <artifactId>microservicecloud</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <packaging>jar</packaging>

    <artifactId>microservicecloud-api</artifactId><!-- 当前Module我自己叫什么名字 -->

    <dependencies><!-- 当前Module需要用到的jar包，按自己需求添加，如果父类已经包含了，可以不用写版本号 -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
    </dependencies>
</project>

新建部门Entity且配合lombok使用

 每次新建一个子模块时，整体父工程的pom文件就会相应的增加对应的module

三、microservicecloud-provider-dept-8001  部门微服务提供者Module

pom.xml

 
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
 
  <parent>
   <groupId>com.uos.springcloud</groupId>
   <artifactId>microservicecloud</artifactId>
   <version>0.0.1-SNAPSHOT</version>
  </parent>
 
  <artifactId>microservicecloud-provider-dept-8001</artifactId>
 
  <dependencies>
   <dependency><!-- 引入自己定义的api通用包，可以使用Dept部门Entity -->
     <groupId>com.uos.springcloud</groupId>
     <artifactId>microservicecloud-api</artifactId>
     <version>${project.version}</version>
   </dependency>
   <dependency>
     <groupId>junit</groupId>
     <artifactId>junit</artifactId>
   </dependency>
   <dependency>
     <groupId>mysql</groupId>
     <artifactId>mysql-connector-java</artifactId>
   </dependency>
   <dependency>
     <groupId>com.alibaba</groupId>
     <artifactId>druid</artifactId>
   </dependency>
   <dependency>
     <groupId>ch.qos.logback</groupId>
     <artifactId>logback-core</artifactId>
   </dependency>
   <dependency>
     <groupId>org.mybatis.spring.boot</groupId>
     <artifactId>mybatis-spring-boot-starter</artifactId>
   </dependency>
   <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-jetty</artifactId>
   </dependency>
   <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-web</artifactId>
   </dependency>
   <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-test</artifactId>
   </dependency>
   <!-- 修改后立即生效，热部署 -->
   <dependency>
     <groupId>org.springframework</groupId>
     <artifactId>springloaded</artifactId>
   </dependency>
   <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-devtools</artifactId>
   </dependency>
  </dependencies>
 
</project>

application.yml

server:
  port: 8001

mybatis:
  config-location: classpath:mybatis/mybatis.cfg.xml        # mybatis配置文件所在路径
  type-aliases-package: com.uos.springcloud.entities    # 所有Entity别名类所在包
  mapper-locations:
    - classpath:mybatis/mapper/**/*.xml                       # mapper映射文件

spring:
  application:
    name: microservicecloud-dept
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource            # 当前数据源操作类型
    driver-class-name: org.gjt.mm.mysql.Driver              # mysql驱动包
    url: jdbc:mysql://localhost:3306/cloudDB01?serverTimezone=UTC              # 数据库名称
    username: root
    password: 123456
    dbcp2:
      min-idle: 5                                           # 数据库连接池的最小维持连接数
      initial-size: 5                                       # 初始化连接数
      max-total: 5                                          # 最大连接数
      max-wait-millis: 200                                  # 等待连接获取的最大超时时间

工程src/main/resources目录下新建mybatis文件夹后新建mybatis.cfg.xml文件

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
  PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
  "http://mybatis.org/dtd/mybatis-3-config.dtd">
  
<configuration>
 
  <settings>
   <setting name="cacheEnabled" value="true"/><!-- 二级缓存开启 -->
  </settings>
 
</configuration>

MySQL创建部门数据库脚本

DROP DATABASE IF EXISTS cloudDB01;
CREATE DATABASE cloudDB01 CHARACTER SET UTF8;
USE cloudDB01;
CREATE TABLE dept
(
  deptno BIGINT NOT NULL PRIMARY KEY AUTO_INCREMENT,
  dname VARCHAR(60),
  db_source   VARCHAR(60)
);
 
INSERT INTO dept(dname,db_source) VALUES('开发部',DATABASE());
INSERT INTO dept(dname,db_source) VALUES('人事部',DATABASE());
INSERT INTO dept(dname,db_source) VALUES('财务部',DATABASE());
INSERT INTO dept(dname,db_source) VALUES('市场部',DATABASE());
INSERT INTO dept(dname,db_source) VALUES('运维部',DATABASE());

DeptDao部门接口

 工程src/main/resources/mybatis目录下新建mapper文件夹后再建DeptDao.xml

 DeptService部门服务接口

 DeptServiceImpl部门服务接口实现类

 DeptController部门微服务提供者REST

 DeptProvider8001_App主启动类DeptProvider8001_App

package com.uos.springcloud;
 
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
 
@SpringBootApplication
public class DeptProvider8001_App{
  public static void main(String[] args){
   SpringApplication.run(DeptProvider8001_App.class, args);
  }
}
 

测试http://localhost:8001/dept/get/2

测试 http://localhost:8001/dept/list

 四、microservicecloud-consumer-dept-80 部门微服务消费者Module

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <parent>
        <groupId>com.uos.springcloud</groupId>
        <artifactId>microservicecloud</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>

    <artifactId>microservicecloud-consumer-dept-80</artifactId>
    <description>部门微服务消费者</description>

    <dependencies>
        <dependency><!-- 自己定义的api -->
            <groupId>com.uos.springcloud</groupId>
            <artifactId>microservicecloud-api</artifactId>
            <version>${project.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- 修改后立即生效，热部署 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>springloaded</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
    </dependencies>
</project>

application.yml

server:
  port: 8080

com.uos.springcloud.cfgbeans包下ConfigBean的编写（类似spring里面的applicationContext.xml写入的注入Bean）

 com.uos.springcloud.controller包下新建DeptController_Consumer部门微服务消费者REST

@RestController
public class DeptController_Consumer
{
    private static final String REST_URL_PREFIX = "http://localhost:8001";

    @Autowired
    private RestTemplate restTemplate;
    
    /**
     * 使用restTemplate访问restful接口非常的简单粗暴无脑。
     * (url, requestMap, ResponseBean.class)这三个参数分别代表
     * REST请求地址、请求参数、HTTP响应转换被转换成的对象类型。
     */
    @RequestMapping(value="/consumer/dept/add")
    public boolean add(Dept dept) {
        return restTemplate.postForObject(REST_URL_PREFIX+"/dept/add", dept, Boolean.class);
    }

    @RequestMapping(value="/consumer/dept/get/{id}")
    public Dept get(@PathVariable("id") Long id) {
        return restTemplate.getForObject(REST_URL_PREFIX+"/dept/get/"+id, Dept.class);
    }

    @SuppressWarnings("unchecked")
    @RequestMapping(value="/consumer/dept/list")
    public List<Dept> list() {
        return restTemplate.getForObject(REST_URL_PREFIX+"/dept/list", List.class);
    }
}

DeptConsumer80_App主启动类

 测试http://localhost:8080/consumer/dept/get/2

 测试http://localhost:8080/consumer/dept/list

 测试http://localhost:8080/consumer/dept/add?dname=AI

 Eureka服务注册与发现

构建步骤

一、microservicecloud-eureka-7001  eureka服务注册中心Module

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <parent>
        <groupId>com.uos.springcloud</groupId>
        <artifactId>microservicecloud</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>

    <artifactId>microservicecloud-eureka-7001</artifactId>

    <dependencies>
        <!--eureka-server服务端 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka-server</artifactId>
        </dependency>
        <!-- 修改后立即生效，热部署 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>springloaded</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
    </dependencies>

</project>

application.yml

 
server: 
  port: 7001
 
eureka:
  instance:
    hostname: localhost #eureka服务端的实例名称
  client:
    register-with-eureka: false #false表示不向注册中心注册自己。
    fetch-registry: false #false表示自己端就是注册中心，我的职责就是维护服务实例，并不需要去检索服务
    service-url:
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/        #设置与Eureka Server交互的地址查询服务和注册服务都需要依赖这个地址。
 

EurekaServer7001_App主启动类

 测试http://localhost:7001/

No application available 没有服务被发现   因为没有注册服务进来当然不可能有服务被发现

二、修改microservicecloud-provider-dept-8001  将已有的部门微服务注册进eureka服务中心

 向pom.xml中添加

 
   <!-- 将微服务provider注册进eureka -->
   <dependency>
     <groupId>org.springframework.cloud</groupId>
     <artifactId>spring-cloud-starter-eureka</artifactId>
   </dependency>
   <dependency>
     <groupId>org.springframework.cloud</groupId>
     <artifactId>spring-cloud-starter-config</artifactId>
   </dependency>

向application.yml中添加

eureka:
  client: #客户端注册进eureka服务列表内
    service-url: 
      defaultZone: http://localhost:7001/eureka

DeptProvider8001_App主启动类

添加@EnableEurekaClient //本服务启动后会自动注册进eureka服务中

测试

先要启动EurekaServer

 三、actuator与注册微服务信息完善

主机名称:服务名称修改

修改microservicecloud-provider-dept-8001

向application.yml中添加

instance:
    instance-id: microservicecloud-dept8001

访问信息有IP信息提示

prefer-ip-address: true     #访问路径可以显示IP地址

微服务info内容详细信息

修改microservicecloud-provider-dept-8001

向pom.xml中添加

   <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-actuator</artifactId>
   </dependency>

总的父工程修改pom.xml添加构建build信息

<build>
   <finalName>microservicecloud</finalName>
   <resources>
     <resource>
       <directory>src/main/resources</directory>
       <filtering>true</filtering>
     </resource>
   </resources>
   <plugins>
     <plugin>
       <groupId>org.apache.maven.plugins</groupId>
       <artifactId>maven-resources-plugin</artifactId>
       <configuration>
         <delimiters>
          <delimit>$</delimit>
         </delimiters>
       </configuration>
     </plugin>
   </plugins>
  </build>

修改microservicecloud-provider-dept-8001

application.yml

info:
  app.name: uos-microservicecloud
  company.name: www.baidu.com
  build.artifactId: $project.artifactId$
  build.version: $project.version$

 集群配置

一、新建microservicecloud-eureka-7002/microservicecloud-eureka-7003

二、按照7001为模板粘贴pom

三、修改7002和7003的主启动类

四、修改映射配置

 五、3台eureka服务器的yml配置

7001

server:
  port: 7001

eureka:
  instance:
    hostname: eureka7001.com #eureka服务端的实例名称
  client:
    register-with-eureka: false     #false表示不向注册中心注册自己。
    fetch-registry: false     #false表示自己端就是注册中心，我的职责就是维护服务实例，并不需要去检索服务
    service-url:
      #单机 defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/       #设置与Eureka Server交互的地址查询服务和注册服务都需要依赖这个地址（单机）。
      defaultZone: http://eureka7002.com:7002/eureka/,http://eureka7003.com:7003/eureka/

7002

server:
  port: 7002

eureka:
  instance:
    hostname: eureka7002.com #eureka服务端的实例名称
  client:
    register-with-eureka: false     #false表示不向注册中心注册自己。
    fetch-registry: false     #false表示自己端就是注册中心，我的职责就是维护服务实例，并不需要去检索服务
    service-url:
      #defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/       #设置与Eureka Server交互的地址查询服务和注册服务都需要依赖这个地址。
      defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7003.com:7003/eureka/

7003

server:
  port: 7003

eureka:
  instance:
    hostname: eureka7003.com #eureka服务端的实例名称
  client:
    register-with-eureka: false     #false表示不向注册中心注册自己。
    fetch-registry: false     #false表示自己端就是注册中心，我的职责就是维护服务实例，并不需要去检索服务
    service-url:
      #defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/       #设置与Eureka Server交互的地址查询服务和注册服务都需要依赖这个地址。
      defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/

六、microservicecloud-provider-dept-8001 微服务发布到上面3台eureka集群配置中

 测试http://eureka7001.com:7001/ 同理可以测试http://eureka7002.com:7002/ ，http://eureka7003.com:7003/ 

 Ribbon负载均衡

 一、Ribbon配置初步

修改microservicecloud-consumer-dept-80工程

在修改pom.xml文件中添加

 　　　　<!-- Ribbon相关 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-ribbon</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>

修改application.yml   追加eureka的服务注册地址

eureka:
  client:
    service-url:
      register-with-eureka: false     #false表示不向注册中心注册自己。
      defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/,http://eureka7003.com:7003/eureka/

对ConfigBean进行新注解@LoadBalanced    获得Rest时加入Ribbon的配置

 

 主启动类DeptConsumer80_App添加@EnableEurekaClient

 修改DeptController_Consumer客户端访问类

 先启动3个eureka集群后，再启动microservicecloud-provider-dept-8001并注册进eureka，再启动microservicecloud-consumer-dept-80

 测试

 

 

 

 

 

 

 二、Ribbon负载均衡

架构说明

Ribbon在工作时分成两步
第一步先选择 EurekaServer ,它优先选择在同一个区域内负载较少的server.
第二步再根据用户指定的策略，在从server取到的服务注册列表中选择一个地址。
其中Ribbon提供了多种策略：比如轮询、随机和根据响应时间加权。

参考microservicecloud-provider-dept-8001，新建两份，分别命名为8002，8003

新建8002/8003数据库，各自微服务分别连各自的数据库

8002SQL脚本

 
DROP DATABASE IF EXISTS cloudDB02;
 
CREATE DATABASE cloudDB02 CHARACTER SET UTF8;
 
USE cloudDB02;
 
CREATE TABLE dept
(
  deptno BIGINT NOT NULL PRIMARY KEY AUTO_INCREMENT,
  dname VARCHAR(60),
  db_source   VARCHAR(60)
);
 
INSERT INTO dept(dname,db_source) VALUES('开发部',DATABASE());
INSERT INTO dept(dname,db_source) VALUES('人事部',DATABASE());
INSERT INTO dept(dname,db_source) VALUES('财务部',DATABASE());
INSERT INTO dept(dname,db_source) VALUES('市场部',DATABASE());
INSERT INTO dept(dname,db_source) VALUES('运维部',DATABASE());

8003SQL脚本

DROP DATABASE IF EXISTS cloudDB03;
 
CREATE DATABASE cloudDB03 CHARACTER SET UTF8;
 
USE cloudDB03;
 
 
CREATE TABLE dept
(
  deptno BIGINT NOT NULL PRIMARY KEY AUTO_INCREMENT,
  dname VARCHAR(60),
  db_source   VARCHAR(60)
);
 
INSERT INTO dept(dname,db_source) VALUES('开发部',DATABASE());
INSERT INTO dept(dname,db_source) VALUES('人事部',DATABASE());
INSERT INTO dept(dname,db_source) VALUES('财务部',DATABASE());
INSERT INTO dept(dname,db_source) VALUES('市场部',DATABASE());
INSERT INTO dept(dname,db_source) VALUES('运维部',DATABASE());

修改8002/8003各自YML

8002YML

server:
  port: 8002

mybatis:
  config-location: classpath:mybatis/mybatis.cfg.xml        # mybatis配置文件所在路径
  type-aliases-package: com.uos.springcloud.entities    # 所有Entity别名类所在包
  mapper-locations:
    - classpath:mybatis/mapper/**/*.xml                       # mapper映射文件

spring:
  application:
    name: microservicecloud-dept
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource            # 当前数据源操作类型
    driver-class-name: org.gjt.mm.mysql.Driver              # mysql驱动包
    url: jdbc:mysql://localhost:3306/cloudDB02?serverTimezone=UTC              # 数据库名称
    username: root
    password: 123456
    dbcp2:
      min-idle: 5                                           # 数据库连接池的最小维持连接数
      initial-size: 5                                       # 初始化连接数
      max-total: 5                                          # 最大连接数
      max-wait-millis: 200                                  # 等待连接获取的最大超时时间
eureka:
  client: #客户端注册进eureka服务列表内
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/,http://eureka7003.com:7003/eureka/

  instance:
    instance-id: microservicecloud-dept8002
    prefer-ip-address: true     #访问路径可以显示IP地址
info:
  app.name: uos-microservicecloud
  company.name: www.baidu.com
  build.artifactId: $project.artifactId$
  build.version: $project.version$

8003YML

server:
  port: 8003

mybatis:
  config-location: classpath:mybatis/mybatis.cfg.xml        # mybatis配置文件所在路径
  type-aliases-package: com.uos.springcloud.entities    # 所有Entity别名类所在包
  mapper-locations:
    - classpath:mybatis/mapper/**/*.xml                       # mapper映射文件

spring:
  application:
    name: microservicecloud-dept
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource            # 当前数据源操作类型
    driver-class-name: org.gjt.mm.mysql.Driver              # mysql驱动包
    url: jdbc:mysql://localhost:3306/cloudDB03?serverTimezone=UTC              # 数据库名称
    username: root
    password: 123456
    dbcp2:
      min-idle: 5                                           # 数据库连接池的最小维持连接数
      initial-size: 5                                       # 初始化连接数
      max-total: 5                                          # 最大连接数
      max-wait-millis: 200                                  # 等待连接获取的最大超时时间
eureka:
  client: #客户端注册进eureka服务列表内
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/,http://eureka7003.com:7003/eureka/

  instance:
    instance-id: microservicecloud-dept8003
    prefer-ip-address: true     #访问路径可以显示IP地址
info:
  app.name: uos-microservicecloud
  company.name: www.baidu.com
  build.artifactId: $project.artifactId$
  build.version: $project.version$

启动3个eureka集群配置区

启动3个Dept微服务启动并各自测试通过

 

 

启动microservicecloud-consumer-dept-80

客户端通过Ribbo完成负载均衡并访问上一步的Dept微服务

默认使用的是轮询算法，每个微服务都会被轮询访问一次

总结：Ribbon其实就是一个软负载均衡的客户端组件，
他可以和其他所需请求的客户端结合使用，和eureka结合只是其中的一个实例。

三、 Ribbon核心组件IRule

根据特定的算法从服务列表中选取一个要访问的服务

 

 

 

四、Ribbon自定义

主启动类上添加@RibbonClient注解

 

 

 

注意：Ribbon自定义配置类不能在包含@CompentScan注解的包及子包下新建

在上述过程中，我们新建一个myrule包，在myrule包下新建MySelfRule配置类。

在github上复制并修改源码 https://github.com/Netflix/ribbon/blob/master/ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer/RandomRule.java

 

 

 Feign负载均衡

参考microservicecloud-consumer-dept-80，新建microservicecloud-consumer-dept-feign

microservicecloud-consumer-dept-feign工程pom.xml修改，主要添加对feign的支持

修改microservicecloud-api工程

pom.xml

 新建DeptClientService接口并新增注解@FeignClient

microservicecloud-consumer-dept-feign工程修改Controller，添加上一步新建的DeptClientService接口

 microservicecloud-consumer-dept-feign工程修改主启动类

 

测试

 

总结

Feign通过接口的方法调用Rest服务（之前是Ribbon+RestTemplate），该请求发送给Eureka服务器（http://MICROSERVICECLOUD-DEPT/dept/list）,

通过Feign直接找到服务接口，由于在进行服务调用的时候融合了Ribbon技术，所以也支持负载均衡作用。 

 

服务熔断

参考microservicecloud-provider-dept-8001，新建microservicecloud-provider-dept-hystrix-8001

 pom.xml

 application.yml

 修改DeptController

 修改主启动类DeptProvider8001_Hystrix_App并添加新注解@EnableCircuitBreaker

 测试

 

 服务降级

修改microservicecloud-api工程，
根据已经有的DeptClientService接口新建一个实现了
FallbackFactory接口的类DeptClientServiceFallbackFactory

 

@Component
public class DeptClientServiceFallbackFactory implements FallbackFactory<DeptClientService> {
    @Override
    public DeptClientService create(Throwable throwable) {
        return new DeptClientService() {
            @Override
            public Dept get(long id) {
                return new Dept().setDeptno(id)
                        .setDname("该ID："+id+"没有对应的信息,Consumer客户端提供的降级信息,此刻服务Provider已经关闭")
                        .setDb_source("no this database in MySQL");
            }

            @Override
            public List<Dept> list() {
                return null;
            }

            @Override
            public boolean add(Dept dept) {
                return false;
            }
        };
    }
}

修改microservicecloud-api工程，DeptClientService接口在注解@FeignClient中添加fallbackFactory属性值

 

 microservicecloud-consumer-dept-feign工程修改YML

 测试

 

 

 服务监控hystrixDashboard

 新建工程microservicecloud-consumer-hystrix-dashboard

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>microservicecloud</artifactId>
        <groupId>com.uos.springcloud</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>microservicecloud-consumer-hystrix-dashboard</artifactId>
    <dependencies>
        <!-- 自己定义的api -->
        <dependency>
            <groupId>com.uos.springcloud</groupId>
            <artifactId>microservicecloud-api</artifactId>
            <version>${project.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- 修改后立即生效，热部署 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>springloaded</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
        <!-- Ribbon相关 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-ribbon</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <!-- feign相关 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-feign</artifactId>
        </dependency>
        <!-- hystrix和 hystrix-dashboard相关-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-hystrix</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-hystrix-dashboard</artifactId>
        </dependency>
    </dependencies>
</project>

application.yml

server:
  port: 9001

主启动类改名+新注解@EnableHystrixDashboard

 所有Provider微服务提供类(8001/8002/8003)都需要监控依赖配置

 　　　　<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

启动microservicecloud-consumer-hystrix-dashboard该微服务监控消费端

启动3个eureka集群

启动microservicecloud-provider-dept-hystrix-8001

启动的相关微服务工程

 

 

 

 

实心圆：共有两种含义。它通过颜色的变化代表了实例的健康程度，它的健康度从绿色<黄色<橙色<红色递减。
该实心圆除了颜色的变化之外，它的大小也会根据实例的请求流量发生变化，流量越大该实心圆就越大。所以通过该实心圆的展示，就可以在大量的实例中快速的发现故障实例和高压力实例。

说明

 

复杂图形

 zuul路由网关

一、路由基本配置

新建Module模块microservicecloud-zuul-gateway-9527

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>microservicecloud</artifactId>
        <groupId>com.uos.springcloud</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>microservicecloud-zuul-gateway-9527</artifactId>
    <dependencies>
        <!-- zuul路由网关 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zuul</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>
        <!-- actuator监控 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <!--  hystrix容错-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-hystrix</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <!-- 日常标配 -->
        <dependency>
            <groupId>com.uos.springcloud</groupId>
            <artifactId>microservicecloud-api</artifactId>
            <version>${project.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jetty</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
        </dependency>
        <!-- 热部署插件 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>springloaded</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
    </dependencies>


</project>

application.yml

server:
  port: 9527

spring:
  application:
    name: microservicecloud-zuul-gateway

eureka:
  client:
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka,http://eureka7003.com:7003/eureka
  instance:
    instance-id: gateway-9527.com
    prefer-ip-address: true


info:
  app.name: uos-microcloud
  company.name: www.uos.com
  build.artifactId: $project.artifactId$
  build.version: $project.version$

hosts文件修改

 主启动类

 

 

 不用路由

 使用路由

 二、路由访问映射规则

代理名称

 

 

 测试

 Spring Cloud Config分布式配置中心

在github上新建一个名称为microservicecloud-config的仓库

由上一步获得SSH协议的git地址    git@github.com:Amonologue129/microservicecloud-config.git

本地硬盘目录上新建 git仓库并clone

在本地路径下新建一个application.yml

 

 将上一步的yml文件推送到github上

新建 microservicecloud-config-3344 module

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>microservicecloud</artifactId>
        <groupId>com.uos.springcloud</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>microservicecloud-config-3344</artifactId>
    <dependencies>
        <!--Spring Cloud Config相关-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-server</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

</project>

application.yml

server:
  port: 3344
spring:
  application:
    name: microservicecloud-config
  cloud:
    config:
      server:
        git:
         

           uri: https://github.com/Amonologue129/microservicecloud-config.git
           username: 
           password: 

主启动类

 hosts文件修改 127.0.0.1 config-3344.com

 

 

 

 

 

 访问的方式

 

 

 在E:\44\mySpringCloud\microservicecloud-config下新建microservicecloud-config-client.yml文件并上传到github上

server:
  port: 8201
spring:
  profiles: dev
  application:
    name: microservicecloud-config-client
eureka:
  client:
    service-url:
      defaultZone: http://eureka-dev.com:7001/eureka
---
server:
  port: 8202

spring:
  profiles: test
  application:
    name: microservicecloud-config-client
eureka:
  client:
    service-url:
      defaultZone: http://eureka-test.com:7001/eureka

配置客户端

新建microservicecloud-config-client-3355 Module

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>microservicecloud</artifactId>
        <groupId>com.uos.springcloud</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>microservicecloud-config-client-3355</artifactId>
    <dependencies>
        <!-- spring cloud config 客户端-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>

</project>

bootstrap.yml

## application.yml 是用户级别的资源配置项
## bootstrap.yml 是系统级别的。优先级更高
spring:
  cloud:
    config:
      name: microservicecloud-config-client   # 需要从git 上读取的资源名称，注意没有yml后缀
      profile: dev  # 本次访问的配置项
      label: master
      uri: http://config-3344.com:3344   # 本微服务启动后先去找到 3344 微服务，通过SpringCloudConfigServer

application.yml 

spring:
  application:
    name: microservicecloud-config-client

修改hosts文件    127.0.0.1  client-config.com

在com.uos.springcloud.rest下新建ConfigClientRest类

@RestController
public class ConfigClientRest {

    @Value("${spring.application.name}")
    private String applicationName;

    @Value("${eureka.client.service-url.defaultZone}")
    private String eurekaServer;
    @Value("${server.port}")
    private String serverPort;

    @RequestMapping("/config")
    public String getConfig(){
        String str = "application: " + applicationName + "\t eurekaServers:" + eurekaServer + " \t serverPort" + serverPort;
        System.out.println(str);
        return str;
    }
}

主启动类

测试

 

Config项目实战

git配置文件本地配置

microservicecloud-config-eureka-client.yml

文件地址  https://github.com/Amonologue129/microservicecloud-config/blob/master/microservicecloud-config-eureka-client.yml

microservicecloud-config-dept-client.yml

文件地址　https://github.com/Amonologue129/microservicecloud-config/blob/master/microservicecloud-config-dept-client.yml

config版的Eureka服务端

新建microservicecloud-config-eureka-client-7001

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>microservicecloud</artifactId>
        <groupId>com.uos.springcloud</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>microservicecloud-config-eureka-client-7001</artifactId>
    <dependencies>
        <!-- eureka-server注册中心 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka-server</artifactId>
        </dependency>
        <!-- config配置中心 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <!-- 热部署 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>springloaded</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
    </dependencies>

</project>

主启动类

 bootstrap.yml

## application.yml 是用户级别的资源配置项
## bootstrap.yml 是系统级别的。优先级更高
spring:
  cloud:
    config:
      name: microservicecloud-config-eureka-client   # 需要从git 上读取的资源名称，注意没有yml后缀
      profile: dev  # 本次访问的配置项
      label: master
      uri: http://config-3344.com:3344   # 本微服务启动后先去找到 3344 微服务，通过SpringCloudConfigServer

application.yml

spring:
  application:
    name: microservicecloud-config-eureka-client

Config的Eureka微服务

 参考之前的8001新建microservicecloud-config-dept-client-8001

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>microservicecloud</artifactId>
        <groupId>com.uos.springcloud</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>microservicecloud-config-dept-client-8001</artifactId>
    <dependencies>
        <dependency><!-- 引入自己定义的api通用包，可以使用Dept部门Entity -->
            <groupId>com.uos.springcloud</groupId>
            <artifactId>microservicecloud-api</artifactId>
            <version>${project.version}</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-core</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jetty</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
        </dependency>
        <!-- 修改后立即生效，热部署 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>springloaded</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>

        <!-- 将微服务provider注册进eureka -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
    </dependencies>

</project>

bootstrap.yml

## application.yml 是用户级别的资源配置项
## bootstrap.yml 是系统级别的。优先级更高
spring:
  cloud:
    config:
      name: microservicecloud-config-dept-client    # 需要从git 上读取的资源名称，注意没有yml后缀
      profile: dev  # 本次访问的配置项
      label: master
      uri: http://config-3344.com:3344   # SpringCloudConfig获取的服务地址

application.yml

spring:
  application:
    name: microservicecloud-config-dept-client

其余文件，直接复制microservicecloud-provider-dept-8001